Big Bang Theory

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Across
  1. 3. A region of space where the density of matter becomes infinite
  2. 5. Hypothetical matter thought to make up 85% of the universe
  3. 10. A space with few to no galaxies in it
  4. 11. The continued progress of existence
  5. 13. A theory that the universe expanded after the big bang
  6. 14. The light from an object when it is moving towards us
  7. 15. A system of stars, gas, and stellar remnants
Down
  1. 1. How hot or cold something is
  2. 2. Matter with a reversed charge
  3. 4. Big, dark, and immense gravity
  4. 6. A unit of temperature
  5. 7. The light of an object when it is moving away from us
  6. 8. The Science of the origin of the universe
  7. 9. A star with a regular cycle of brightness
  8. 12. The angle between the Earth at one time of the year and the angle 6 months later